Throttle-valve operating mechanism



HQ SWOY ER THROTTLE VALVE OPERATING MECHANISM May 12, 1925.

Filed D66. .2. 1924 NVENTOR Patented May 12, 1925.-

HABRY swoYEB, or nimxmmnnvv YORK.

THROTTLE-VALVE OPERATING- MECHANISM.

Application filed December 12, 1924. Serial No. 755,382.

'1 '0 all to 720m it may concern Be it known that LIIARRY Swoxna, of Dunkirk, in the county of Chautauqua and State of New York, have invented a certain new and useful Improvement in Throttle- Valve. Operating Mechanism, of which improvement the following is a specification.

My invention, while particularly designed for application in connection with throttle valves of locomotive engines, is equally adaptable for use with those of engines of other descriptions, and its object is to provide an operating mechanism which shall be of simple and inexpensive construction, and which, in operation, can be conveniently manipulated by the engineer in effecting de sired movement of the throttle valve in either direction.

The improvement claimed is hereinafter fully set forth.

- In the accompanying drawing: Figure 1 is a partialrear view of the back head of a locomotive boiler, showing, in side elevation, an application of my invention; Fig. 2, a partial side view, with my invention shown in end elevation; Fig. 3, a side elevation, illustrating a modification of structural detail; Fig. 4, a side view, on an enlarged scale, of the ope'ating cams; and Fi 5 an end view of the same.

V In the pract-iceof my invention, referring deseriptively to the specific embodiment thereof which is herein exen'iplifiechI provide a transmission shaft, 1, which is journailed, preferably, as shown, in an inclined position, in a lower bearing, 2, bolted to the back head, 3, of the boiler, near one side thereof, and two upper bearings, 2 2, which are formed integral with, or fixed to, a rearward extension, 11*, of the stuffing box, 11, through which a throttle rod, 10, passes, said rod extending to the throttle valve, which isnot shown, and may be of any suitable known construction. The throttle rod passes through a bearing, 11", on the outer end of the'extension, 11, serving as a guide for the outer end of the throttle rod. An operating lever, 4, on which is fixed a handle, l, is secured upon the lower end of the shaft, 1, and carries a latch lever,.5, adapted to engage a toothed segment, 6, fixed on the lower bearing, 2;

Two segmentally grooved cams, 7, 7 are secured upon the shaft, 1, adjacent to the upper bearings, 2", the grooves of said cams being engaged by trunnions, 8, 8", pro ecting laterally froma sleeve, 9, keyed on the throttle rod, 10. In order to minimize friction between the trunnions, 8 and the cams,

7, ball bearings, 12, may be interposed between them, as shown in Figs. 4t and 5.

The transmission shaft, 1, may be either made in sections, connected by universal joints, as shown in Fig. l, or be made in a single piece, as in Fig. 3.

It will be obvious to those familiar with the construction and operation of locomotive engines, that the operating mechanism above described is readily adaptable to application, under the ordinary conditions of present standard practice, at comparatively slight structural expense; that the operating lever can be located in positionwhere it will be within easy reach of the engineman; and that any desired degree of leverage upon the throttle valve may be obtained by correspondingly proportioning the operating lever and cam arms.

I claim as my invention and desire to so cure by Letters Patent:

1. In a throttle valve'operating 1nechanism, the con'ibinat-ion of a longitudinally movable throttle rod; a transmission shaft, journalled transversely thereto; a cam, fixed on said shaft; a member, fixed on thethrottle rod and engaging said cam; and means for rocking the transmission shaft in its bearings.

2. In a throttle valve operating mechanism, the combination of a longitudinally movable throttle rod; a transmission shaft,

journalled transversely thereto; a segmen tally grooved cam, fixed on said shaft; a trunnion, fixed on the throttle rod and engaging the groove of the cam; and an operating lever, fixed on the transmission shaft.

3. In a throttle valve operating mecha nism, the combination of a longitudinally movable throttle rod; a transmission shaft, journalled transversely thereto; two segmentally grooved cams, fixed on said shaft, on opposite sides of the throttle rod; trunnions, fixed 011 the throttle rod and projecting into the grooves of the cams; and an operating lever, fixed on the t'ansmission shaft.

4c. In a throttle valve operating mechanism, the combination of a throttle rod; a stufiing box, through which said rod is adapted to be moved longitudinally; an extension, projecting longitudinally from said stuffing box; a guide bearing on said extension, through which the throttle rod passes; a transmission shaft, journalled in a hearing on the stufling box extension, transversely to the throttle rod; 21 segmentally grooved cam, fixed on said shaft; a trunnion fixed on the throttle rod and engaging the groove of the cam; and an operating lever, fixed on the transmission shaft.

5. In a throttle valve operating mechanism, the combination of a longitudinally movable throttle rod: :1 transmission shaft, journalled transversely thereto; two segmentally grooved cams, fixed on said shaft, 011 opposite sides of the throttle rod; trunnions, fixed on the throttle rod and projecting into the grooves of the cams; ball bearings interposed between the trunnions and the cams; and an operating lever, fixed on the transmission shaft.

HARRY SVO YER. 

